GMC chervolet camaro 1999 Service Manual page 195

1-104 HVAC System - Manual
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Heater Pipes Replacement (5.7L)
Removal Procedure
1. Partially drain the engine coolant.
HVAC
2. Remove the inlet and outlet heater hoses from the
water pump.
2.1. Squeeze the hose clamp together with pliers.
2.2. Slide the hose clamp away from the water
pump fitting.
2;3. Gently twist and pull the heater hose from
the water pump fitting.
2.4. Remove the heater hose.
2.5. If the heater hoses cannot be removed
easily perform the following steps:
2.5.1. Cut the hose forward of the
hose pipe.
2.5.2. Cut the hose remaining on the
water pump fitting lengthwise.
Remove the heater hose.
3. Remove the bolt attaching the inlet and outlet
hose bracket at the mid rail.
Notice: Do not apply excessive force on the heater
core pipes during hose removal. Applying excessive
force on the heater core pipes may damage the heater
core pipes.
4. Remove the inlet and outlet hoses from the
heater core.
4.1. Squeeze the hose clamp with pliers.
4.2. Slide the clamp away from the heater core
fittings.
4.3. Gently twist and pull the heater hose from
the heater core fitting.
5. Remove the inlet hose from the module retainer.
6. Remove the inlet and outlet hoses from the
vehicle.
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